Similarly, (Ovadiah 1:18) "And there will be no survivor of the house of Esav, for the mouth of the L–rd has spoken." And where did He speak it? (Numbers 24:18-19) "And Edom (Esav) will become an inheritance … and a victor will issue from Jacob and will destroy all trace of Ir."
Instead Found Himself Compelled by God to Utter Prophecy After
Mekhilta Tractate Pischa 12:19